JPS6463915A - Objective lens for microscope - Google Patents
Objective lens for microscopeInfo
- Publication number
- JPS6463915A JPS6463915A JP62220928A JP22092887A JPS6463915A JP S6463915 A JPS6463915 A JP S6463915A JP 62220928 A JP62220928 A JP 62220928A JP 22092887 A JP22092887 A JP 22092887A JP S6463915 A JPS6463915 A JP S6463915A
- Authority
- JP
- Japan
- Prior art keywords
- group
- lens
- biconcave
- biconvex
- refracting power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Lenses (AREA)
Abstract
PURPOSE:To compensate distortion excellently by specifying the relations among the refractive indexes, center thickness, radii of curvature, and Abbe numbers of lenses in a 4th group, and the composite focal length of the whole system. CONSTITUTION:This lens consists of a 1st group L1 composed of a positive meniscus lens having its convex surface on an object side, a 2nd group L2 with positive refracting power, a 3rd group L3 which consists of a cemented lens of a biconvex lens and a biconcave lens and has negative refracting power on the whole, and a 4th group L4 which consists of a cemented lens of a biconcave and a biconvex lens and has positive refracting power. Then inequalities I-IV hold, where nn is the refractive index of the biconcave lens in the 4th group, np the refractive index of the biconvex lens in the 4th group, Dp the center thickness of the biconvex lens in the 3rd group, Ra the radius of curvature of the object-side lens surface of the biconvex lens in the 3rd group, Dn the center thickness of the biconcave lens in the 3rd group, upsilon the Abbe number of the biconcave lens in the 3rd group to a (d) line (lambda=587.6nm), and (f) the composite focal length of the whole system. Consequently, the distortion can be compensated excellently.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22092887A JPH0823628B2 (en) | 1987-09-03 | 1987-09-03 | Objective lens for microscope |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22092887A JPH0823628B2 (en) | 1987-09-03 | 1987-09-03 | Objective lens for microscope |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6463915A true JPS6463915A (en) | 1989-03-09 |
JPH0823628B2 JPH0823628B2 (en) | 1996-03-06 |
Family
ID=16758750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22092887A Expired - Lifetime JPH0823628B2 (en) | 1987-09-03 | 1987-09-03 | Objective lens for microscope |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0823628B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5075285A (en) * | 1987-09-17 | 1991-12-24 | Kernforschungszentrum Karlsruhe Gmbh | Silver alloy sheathing material for ceramic superconducting wires |
US5235465A (en) * | 1990-04-24 | 1993-08-10 | Dainippon Screen Mfg. Co., Ltd. | Objective lens system for use within microscope |
-
1987
- 1987-09-03 JP JP22092887A patent/JPH0823628B2/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5075285A (en) * | 1987-09-17 | 1991-12-24 | Kernforschungszentrum Karlsruhe Gmbh | Silver alloy sheathing material for ceramic superconducting wires |
US5235465A (en) * | 1990-04-24 | 1993-08-10 | Dainippon Screen Mfg. Co., Ltd. | Objective lens system for use within microscope |
Also Published As
Publication number | Publication date |
---|---|
JPH0823628B2 (en) | 1996-03-06 |
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